a dumb 2 step equation i always mess up. help?  TOPIC_SOLVED

Simplificatation, evaluation, linear equations, linear graphs, linear inequalities, basic word problems, etc.

a dumb 2 step equation i always mess up. help?  TOPIC_SOLVED

Postby xXphotographyXx on Tue Oct 20, 2009 1:03 am

hiii, i have a question about this question i always mess up on. i think i got it but im not sure. i went back to look at problems a got wrong a while ago, and this is one of them. here it is:

if three times jills bowling score is increased by 100 less than twice her score, the result is 900. find her score

responces are greatly appriciated. thaaaannkkksss! :)

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Re: a dumb 2 step equation i always mess up. help?

Postby dragonwench on Tue Oct 20, 2009 2:54 am

xXphotographyXx wrote:if three times jills bowling score is increased by 100 less than twice her score, the result is 900. find her score


Ok-

So the first thing you need to figure out is "What are you solving for?" =x

and then what do you already know?

so what does X represent?

and you know What is increased by ....

what amount ? .....

and what (if any) other information is already given to you?
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Postby stapel_eliz on Tue Oct 20, 2009 11:47 am

xXphotographyXx wrote:i think i got it but im not sure.

Plug your solution back into the original exercise, and see if it works. If it does, then you "got it"! :wink:

(Otherwise, please post your steps and solution, so we can check what you've done. Thank you!)
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Re: a dumb 2 step equation i always mess up. help?

Postby xXphotographyXx on Wed Oct 21, 2009 1:22 am

alright. thanks both of you:]]

let x= jills score
3x+2x-100=900
5x-100=900
5x=1000
x=200


CHECK(hehe,i forgot this step):
3(200)+2(200)-100=900
600+400-100=900


:D
i got it!
thanks for your help! :D
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